A warbler

Two of these lively little warblers have been in the neighborhood for a few days.

Pine Warblers are often difficult to see as they usually stay high up in pines. Insects make up most of their diet, but they also eat fruits and seeds. They occasionally forage on the ground or come to feeders. Males sing even, rich trills from the tops of pines.

And…

The Pine Warbler is the only warbler that eats large quantities of seeds, primarily those of pines. This seed-eating ability means Pine Warblers sometimes visit bird feeders, unlike almost all other warblers.

Most warblers leave the continental U.S. for winter, but the Pine Warbler stays in the Southeast and is one of the first to return northward in spring.